Function addCommas

src/util/format.ts:32–39

(x: string | number)

 * Add a comma each three digit.
 */
export function addCommas(x: string | number): string {
    if (!isNumeric(x)) {
        return zrUtil.isString(x) ? x : '-';
    }
    const parts = (x + '').split('.');
    return parts[0].replace(/(\d{1,3})(?=(?:\d{3})+(?!\d))/g, '$1,')
            + (parts.length > 1 ? ('.' + parts[1]) : '');
}

export function toCamelCase(str: string, upperCaseFirst?: boolean): string {
    str = (str || '').toLowerCase().replace(/-(.)/g, function (match, group1) {